Micro solar inverters are grid-tied and operate on AC power. A micro inverter, located at the panel, converts power to AC, meaning the cables running to the array carry AC instead of the DC common with string inverters. The AC isolator is distinguishable by its red and yellow colors, while DC is marked by grey and black.
The solar power landscape is expanding, offering a broader array of solar-to-power solutions, including a variety of inverters such as AC-coupled, hybrid, and both on and off-grid types. This discussion focuses on the upgrade path for micro solar systems.
Starting with a micro solar inverter attached to one, two, or four panels and expanding later can pose challenges. Users need confidence and the appropriate hardware to support such changes. This Combiner option is fitted where the image above sets out the “Junction Box” or prior to this, but after the disconnect.
Consider the Hoymiles 800 solar kit as an example; you can connect one to your home to generate up to 800 watts of power. If you decide to add another, your capacity increases to 1600 watts. It’s feasible to expand up to six units in parallel, yielding 4.8Kw of solar power, which brings us into G99 territory, but you may have these else where, which is not convenient to split from the Junction box.
For grid-tied solar, diversifying your setup can be beneficial, especially when space is limited. You might install two panels in one location and two in another, optimizing peak power production at different times for better energy efficiency at home.
A combiner box is a straightforward device that mounts to the wall and features a feed (grid) with two inputs ( inverter), simplifying the expansion of your solar system. Depending on your setup, you might have a 2.5mm SWA feed to your mains power and possibly two 1.5mm supply lines for the inverters. Within the combiner box, there is a protection circuit that safeguards both your home and personal safety.
1x Din
1x RCBO
1x Earth
1x ABS enclosure
3x Glands
£85.00 + P&P
Note:
The cable from the grid to the combiner should have an isolator and be capable of the total loads added to the combiner, with SWA 30 amps can be carried (6.9Kw) which may be split over two or more sets of inverters. for example the 2000W micro inverter as three sets. the combiner box is NOT vented, and should not be installed in direct sunlight. Identification stickers should be used and are not supplied with this item..
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